The Force 10 delivers a true 1000w/s of power and has an ISO 100 guide number of 540 with the normal 11.5" reflector. The fan-cooled monolight can operate at 4 or 5 frames per second at low power levels. Audible and visual ready indications at 100% recycle are provided. With normal reflectors (the Force 10 accepts all Speedotron light control accessories), it has a lighting range of 8 f-stops, variable in 1/3 or 1/6 stop increments. Using the same innovative focusing ring as the Black Line 202VF and 206VF light units, the beam angle of the normal reflector can be changed from 35° to more than 90°. This expands the total guide number output range from 42 to 540. The monolight weighs 8 lbs., and comes with flash tube, 250w model lamp, 11.5" reflector and 20' PC cord.